Aluminum alloy products and methods

Details Aluminum alloy products and methods Aluminum alloy products and methods

1980-04-18

1981-10-13

Dean, R.

Metal treatment

Compositions

Heat treating

75141, 75142, 148 3, 148 115A, 148 127A, 148 32, 148 325, 148159, C22F 104, C22C 2116

Patent

active

042946255

ABSTRACT:
A 2000 series aluminum alloy characterized by high strength, very high fatigue resistance, and very high fracture toughness consists essentially of 3.8% to 4.4% copper, 1.2% to 1.8% magnesium, 0.3% to 0.9% manganese, maximums of 0.12% silicon, 0.15% iron, 0.25% zinc, 0.15% titanium, 0.10% chromium, 0.05% of each of any other trace elements present, and a maximum total of such other trace elements of 0.15%, the balance of the alloy being aluminum. It is preferred, especially for plate products, that the maximum iron and silicon levels be restricted to 0.12% and 0.10%, respectively. For extruded products, the foregoing alloy is hot worked to yield a wrought product having a substantially unrecrystallized structure. For plate products, the alloy is subjected to room temperature preaging and a cold rolling treatment to provide a reduction in gauge of from 9% to 13%.

REFERENCES:
patent: 3826688 (1974-07-01), Levy

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